Heat and pressure applying apparatus



Dec. 13, 1949 MARZIAN] 2,490,915

HEAT AND. PRESSURE APPLYING APPARATUS Filed Nov. 5, 19.46

5 Sheets-Sheet 1 HIH INVENTOR foje v/z 076/3267?! BY ATTORNEY Dec. 13,1949 J. MARZIANI flEAT AND PRESSURE APPLYING APPARATUS 3 Sheets-Sheet 2Filed Nov. '5 1946 Fly 6.

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w m a Dec. 13, 1949 J. MARZlANl HEAT AND PRESSURE APPLYING APPARATUSFiled NOV. 5, 1946 3 Sheets-Sheet 3 IN VE N 7' 0R fise v/z 075/ er f 72WATTORNEY Patented Dec. 13, 1949 HEAT AND PRESSURE APPLYING APPARATUSJoseph Marziani, Philadelphia, Pa.

Application November 5, 1946, Serial No. 709,081

4 Claims. 1

My invention relates to a heat and pressure applying apparatus of thetype adapted to be used for sealing the mouths of bags or for laminatingother sheets made of fusible material by applying heat and pressurethereto. One form of such apparatus is disclosed in my prior Patent No.2,414,157 entitled Heat and pressure applying device.

One object of the invention is to produce an improved apparatus of thetype set forth.

A further object is to produce an improved apparatus of this type whichis provided with means for automatically folding the mouth of the bagupon itself prior to the application of heat and pressure thereto.

A still further object is to produce an improved apparatus of this typein which the folding action is conveniently and accurately controlled.

A still further object is to produce an improved apparatus in which thefolding operation is performed in the course of the application of heatand pressure to the members to be joined.

These and other objects are attained by my invention as set forth in thefollowing specification and as illustrated in the accompanying drawingsin which:

Fig. 1 is a top plan view of the improved apparatus embodying myinvention.

Fig. 1a is a fragmentary top plan view showing details of construction.

Fig. 2 is a view, partly in elevation and partly in vertical section, ofthe apparatus shown in Fig. 1, certain parts being broken away.

Fig. 3 is a front elevational view, certain parts being broken away toshow details of construction.

Fig. 4 is a vertical sectional view, looking in the direction of line4-4 on Fig. 1.

Fig. 5 is a diagrammatic view, showing the apparatus as it appearsduring the folding operation and prior to the application of pressure onthe mouth of the bag.

Fig. 6 is a diagrammatic view, showing the apparatus after completion ofthe folding operation and as it appears during the first stage in theapplication of heat and pressure.

Fig. '7 is a view similar to Fig. 6, showing the apparatus as it appearsduring the final stage in the application of heat and pressure, and justprior to its return to the non-operating position of Fig. 5.

Figs. 8, 9, 10 and 11 are fragmentary views showing details ofconstruction.

Referring to the drawings, l2 designates a base casting adapted to besecured by bolts l4 passing 55 through holes [5 to a support or platforml6. At the front thereof, the casting l2 carries a fixed lower jaw 18provided with an opening IQ for receiving a tubular heating element 20(Fig. 3). The heating element is preferably of the wellknown type.

Coacting with the lower fixed jaw I8 is an upper articulated jaw 24which is also provided with an opening similar to the opening 19 forreceiving another tubular heating element 20. The heat of the jaws l8and 24 may be measured and regulated by any suitable conventional means25. The upper jaw 24 is suspended from a head 26 by means of slide bolts21 (Figs. 1 and 3) and is cushioned by springs 28 seated in recessesformed in the under side of the head 26. The tension of the springs 28may be regulated by means of screws 29 or the like. The head 26 iscarried. by the front ends of forwardly diverging arms 30 carried by orformed at the end of an arm 32. The spaced arms 30 are connected by across piece 34 in which is mounted a vertically adjustable threaded boltor stem 36, which will hereinafter be further referred to.

The arm 32 is connected by a pivot pin 40 to a pair of links 42 which,in turn, are secured, by a pivot pin 44, to a lug 46 formed on a rockerarm 48. The rocker arm 48 is provided, at one end thereof, with atransversely disposed sleeve 50 through which extends a pivot pin 52,which engages vertical walls 54 of the base casting l2. The rocker arm48 is thus rotatable about the axis of the pin 52.

' Near its other end, the rocker arm 48 is connected, by means of apivot pin 60, to a pair of links 62 which are, in turn, connected, bymeans of a pivot pin 64, to the end 65 of an operating lever 66. Theoperating lever 66 is fulcrumed on a pivot pin 68 which is secured topendant portions 10 of the base casting I2. The operating lever 66terminates in a foot-operated pedal (not shown), or, if desired, a primemover acting on the pivot pin 64 may be employed for actuating theapparatus.

At the end of the rocker arm 48 is fixed a pendant latch 16, the lowerhooked end of which is adapted to engage a sliding bolt 18, which isurged toward the latch by a spring 80. The operating lever is alsoprovided with a recess in which is positioned a spring 82, which forms acushioned stop for the downward movement of the adjacent end of therocker arm 48 when the latter moves to the non-operating position ofFig. 2. The spring 82 also yieldably abuts the under side of theadjustment bolt 36 when the ap pin HD: which isacarriedyby'the bolt 18.

upper and lower jaws to fold the mouth of a bag or other material in amanner and-for a purpose hereinafter set forth.

To the rod 88 is also fixedly secured one end of an arm 92, the otherend of which is connected, by means of a pivot, pin 93,-to the upper endof a link 94. The lower end of thelink 93 is pivoted, at 95, to an arm96, one end'of-which is rotatable on a pin fl'lsecured to the side lugs.84, andwtheiother end ofqgwhich terminates in a 'sle'eve'qlfilp. Thesleevez-lflhhousesthe bolt 78 and the s'pring1-8i!abovegnientioned, andalso carries an adjustmentdevice, best, shown in Figs. 8 to 11-,forregulatingathe position of the bolt 18. This adjustment deviceincludes a vertical plate [06..piVotedfat Jillv to:-the arm 96 andprovided with an arcuate slot:!l-08 through which projects a The pin:l:l0,;under action of'th'espring 86 on the bolt 18,, is,:moved tothedeft and engages the lefthand-wall ofctheslot lflii :as viewed in thedraw- "ings, thus ,zlim-iting -the extent to which the bolt -T8 mayprojectoutwardlyiof the sleeve I92. The

plateziiifi is secured to a plate H2 by means of a3bolt1l3engaging. ayertical slot in the plate H2, so that the plate H16- may-beraised orlow- ;ered relative to the -plate HZfthereby changing pivot pin :93and-secured-atitsrlower-end to a.

;fi .8d -Pil1t J19 carried;- by,;t-he base casting I2.Thedownwardmovemen't of the arm Stand the :parts carriedthereby islimited,- by means of a stop l 28, which is carriedby or forms part ofthe .baseacasting and which is preferably: resilient so as to cushionthe. shock and deaden the noise.

' operation In using the .apparatus .described, the operator slips themouth,l.2-2,of ab'ae. dro'ther sheets .tobe laminated ihtojthe space.between the blade 9 I and the upper ahdlower jaws,,and then rotates,theoperating1evert6 in clockwise direction about the-fulcrum 68 'so ato move the links IiZa-bout their'pivotjpins 6'0 and. from the positionshown in Fig. 2, t o the position shown in Fig. 5, in which the bolt 18is raised to anupper position by action, of the lower hooked end of thelatch '16 which engages the under side of the adjacent end or the bolt18. The upward movement of the bolt; is ca sest e link94 to rotatethearm' 92 in 'c'lockwisedirection, thus rotating the rod 88 about thebearings 'fi'l. Rc'itation'of the [rod 8 causes the folding blade 'toenter between the upper and tion shown in Fig. 2. This movement of theparts rotates the rod 88 in counterclockwise direction and thuswithdraws the blade 9! from between the jaws.

Continued rotation of the operating lever 66 in clockwise directionfurther raises the pivot point 60 and the adjacent end of the rocker arm48 and byjcausing the linkstd-itomoveyfrom the inclined position of Fig.2 toward the vertical position of Fig. 6, raises the end of the arm 32,thus depressing the upper jaw down upon the lower jaw, as shown in Fig.6. In this position, the .jaws apply heat and some pressure to the mouthof the bag.

Additional'rotation of the operating lever in clockwise direction aboutthe fulcrum 68 further lower jaws a predetermined distance, thus 'fol'd-[ing the mouth of theba'g uponitself, as shcwnin Fig. 5.

f'cdiinnued upward movement or the latch 16 'di'sen'g'agesthelower-,hookedfehd thereof from the end ofthe bolt =18 and the spring H8now the linkil l; tneanaez, the armraa, and the bolt 18 carried therebydown, or back to the posirotates the rocker -arm 48 in counterclockwisediabout the pivot pin 52 until it forms a very acute angle with avertical plane passing through the axis got the pivot pin ,52. The links:42 are inowsubstantially vertical, thus further ira'i'singzthe end; of;the arm-3:2; and exerting additional downward-;=force on thenpper jaw soas-to applwincreased 1 pressure. -As, illustrated in Fig.

7,; the Jinks-.462 rnowslopedownwardly from the pivotpin 60intheydir-ection' of the-jaws. In this position, the upper end of thespring 82 abuts the under; side of the-adjustable bolt ;-3B, which isi481may-;be- -rotated; incounterclockwise, direction.

Obviously, the lower the bottom., en"d of the boltGB-:relativato.:the-crossmiece 34, the smaller the range of possiblemovement of theparts; and vice versa.

When; pressure ongthe,footlever is released, the parts:.-returnautomatically to -the position shown in Fig. 2,.in which "the lowerhooked end of thelatch Hi 'againvengages' the endof the jbolttl Wand".the A apparatus: is ready I f or another cycleofsoperation.

'The 'extent' to which the= blade 91 enters between the jaws isregulated by varying the positibhcift'h-ibolt ftl relative --to thela'tch !5. For example, if the bolt-protrudes to 'a greater exrewardsthe l atch, the=hobked lower end of the latch will engagealer'g'erpcrnon of the under 'sideof- 'the bolt and the latch will-haveto be raise a g reaiter di'staiilce before -it will be disengagedf-rorhthe end-offline bolt. Since raismg; lin erie-dame boltraise's-the linksst and 'c'ause'sth'e arm-d2 and the-blade "91 to rotate in clockwise,direction, it follows that the longer the "durationofthe.ierigage'rn;ent"of the hooked end of the latch with fthe 'e'ndof thebolt, the

The extent to which the boltjl'iljprotrudes towards thelatchilfi,is;regulated by varying-the position namep ate ijnjsi'to Ithepla-te 1:2. Forexample if .the .ib'oIt T13 is loosened and. the

plate N16 is rotated incounterclockwise: direction the bolt further tothe left. If the procedure isreversedwand the'plate 7406 is raisedrelative to the plate Iii-,fithe-lpinJi-D will-engage the -.-r-lower;narrower rportionp-of the; slot 4-0.8 and will --;move. -the :bolt to{thegright against the action; of

the end of the bolt I8 is engaged by the lower hooked end of the latch16.

It will be seen from the foregoing that by movement of the foot pedal,or by mechanical actuation of the apparatus by a prime mover, the blade9| moves in between the jaws, folds the material being joined, and movesout from between the jaws simultaneously with the movement of themovable jaw towards the fixed jaws. Also, it is to be noted that thepressure is applied in two, albeit continuous stages. Thus, when theoperating lever is moved downwardly only until the jaws meet, one degreeof pressure is applied. If, on the other hand, the movement of theoperating lever is continued until the links 62 assume the position ofFig. 7 and the spring 82 abuts the lower end of the adjustment bolt 36,another and greater degree of pressure is exerted.

The blade 9! does not only fold the material between the jaws so as toprovide increased strength but, in so doing, the blade obviates thenecessity of manually inserting the material between the jaws, thuspreventing, or at least minimizing possible injury to the fingers of theoperator.

In this connection, it is pointed out that the blade 9| can be used foronly inserting the material between the jaws without folding it. Forexample, if the margin of the material is of a reduced width, the actionof the blade will merely cause such margin to enter the space betweenthe jaws and to lie fiat upon the surface of the lower' jaw or to assumea position parallel to said jaw.

What I claim is:

1. Apparatus of the character stated including a frame, a first jawfixedly carried by said frame, a movable arm, a second jaw carried byone end of said arm in registration with said first jaw, a first rockermember carried by said frame, means pivotally connecting the other endof said arm to said first rocker member, an operating lever, meansfulcruming said lever to said frame, means pivotally connecting saidfirst rocker member to the end of said operating lever, said firstrocker member and its pivotal connections to said arm and to saidoperating lever being'such that rotation of the end of saidoperatingjlever about its fulcrum point actuates said arm in a directionto cause said second jaw to move towards said first jaw, a second rockermember, means supporting said second rocker member near said jaws, ablade carried by said second rocker member intermediate means forautomatically operatively connecting said first rocker arm to saidsecond rocker arm during movement of said first rocker arm through apredetermined distance, and for automatically disengaging said secondrocker arm from said first rocker arm after the movement of said firstrocker arm through said predetermined distance whereby said secondrocker arm is actuated by the initial movement of said first rocker armto cause said blade to enter the space between said jaws, and meansbiasing said rocker arm in a direction to withdraw said blade frombetween said jaws upon disengagement of said second rocker arm from saidfirst rocker arm whereby said blade is automatically withdrawn frombetween said jaws while said second jaw is moving towards but before itabuts said first jaw.

2. The structure recited in claim 1 in which said intermediate means isadjustable so as to vary the length of the distance through which thefirst rocker arm will travel with said second rocker arm operativelyconnected thereto, thereby to vary the extent to which said blade entersbetween said jaws.

3. The structure recited in claim 1 in which said intermediate means isin the nature of a latch carried by said first rocker arm and a boltpivotally carried by said frame and so disposed that its end is engagedby said latch during the initial movement of said first rocker arm, saidbolt being movable about its pivot in a direction opposite to thedirection of movement of said first rocker arm, whereby after said firstrocker arm has moved through a predetermined distance, said bolt isdisengaged from said latch.

4. The structure recited in claim 3 in which said intermediate means isin the nature of a latch carried by said first rocker arm, a boltpivotally carried by said frame and so disposed that its end is engagedby said latch in one position of said first rocker arm, said bolt beingmovable about its pivot in a direction opposite to the direction ofmovement of said first rocker arm, whereby after said first rocker armhas moved to a predetermined position, said bolt is disengaged from saidlatch, and means for varying the position of said bolt relative to saidlatch to vary the point in the movement of said rocker arm at which saidlbOlt is disengaged from said latch.

JOSEPH MARZIANI.

REFERENCES CITED UNITED STATES PATENTS Name Date Irmscher May 22, 1945Number

